Values.Mp3SettingsSourceRequired when you set Codec, under AudioDescriptions>CodecSettings, to the value MP3.
type nonrec t = {bitrate : int option;Specify the average bitrate in bits per second.
*)channels : int option;Specify the number of channels in this output audio track. Choosing Follow input will use the number of channels found in the audio source; choosing Mono gives you 1 output channel; choosing Stereo gives you 2. In the API, valid values are 0, 1, and 2.
*)rateControlMode : Mp3RateControlMode.t option;Specify whether the service encodes this MP3 audio output with a constant bitrate (CBR) or a variable bitrate (VBR).
*)sampleRate : int option;Sample rate in Hz.
*)vbrQuality : int option;Required when you set Bitrate control mode to VBR. Specify the audio quality of this MP3 output from 0 (highest quality) to 9 (lowest quality).
*)}